search for: statiscal

Dear all, how can i do the calculate the C-statistics 95% confidences interval for the cox regression model. Thanks very much for your any help. Paaveenthan _________________________________________________________________ [[elided Hotmail spam]] [[alternative HTML version deleted]]

hi Just wondering if there is any statiscs report of selinxu usages in production environment? I know some still turn it off. thanks. min

Hi there, I am trying to export a regression output to Latex. I am using the xtable function in the xtable library. Doing myfit <- lm(myformula, mydata) print.xtable(xtable(myfit), file="myfile") only returns the estimated coefficients and the correspondent standard erros, t-statiscs and p-values. But I wish to get a bit more, say, the number of observations used in the

This is a more general statiscal question, not specific to R: As I move through my masters curriculum in statistics, I am becoming more and more attuned to issues of model fit and diagnostics (graphical methods, AIC, BIC, deviance, etc.) As my regression professor always likes to say, only draw substantive conclusions from val...

...of all, I have only been using are a short time and I'm not an expert in statistics either. I have the following problem. I'm working with measurements of physical samples, each measurement has about 4000 variables. I have 33 of those samples. From those 400 variables I deduced through non-statiscal means that I needed about 200 of them. I read those into a data.frame with 200 columns of 33 rows. As I expected, quite a few variables have a fairly high correlation with one another (as high as 0.96). The individual variables are about normally distributed according to the Shapiro-Wilks test. Wi...

...arameterization. The output looks like Beta p-value th1.(Intercept) 550 <0.000 th1.A1 -15 <0.000 th1.B1 5 <0.032 th1.C1 -12 <0.001 th1.C2 -5 0.022 th1.C3 -3 0.222 th2.(Intercept) ...... ......etc if we look at the results, we may conclude that level 3 for Factor C is not statiscally significant. The question is: How can I remove this level of this factor from the analysis? Let's say that the final results looks like Model: Logistic 3-parms. where th1~1+A+C, th2~1+C; th3~1, but C with levels 1,2 and 4 only Beta p-value th1.(Intercept) 560 <0.000 th1.A1 -15 <...

Hi there! I´m a noob when it comes to R and I´m using it to run statisc analysis. With the code for ARIMA below I´m getting this error: Error in solve.default(res$hessian * n.used) :Lapack routine dgesv: system is exactly singular The code is: > s.ts <- ts(x[,7], start = 2004, fre=12) > get.best.arima <- function (x.ts, maxord=c(1,1,1,1,1,1)) + { + best.aic <- 1e8 + n <-

Hi r-helpers. Please forgive my ignorance, but I would like to plot a smoothing spline (smooth.spline) from package "stats", and show the knots in the plot, and I can't seem to figure out where smooth.spline has located the knots (when I use nknots). Unfortunately, I don't know a lot about splines, but I know that they provide me an easy way to estimate the location of local

Hello all, here's a real-world example: I'm measuring a quantity (d) at five sites (site1 thru site5) on a silicon wafer. There is a clear site-dependence of the measured value. To find out if this is a measurement artifact I measured the wafer four times: twice in the normal position (posN), and twice rotated by 180 degrees (posR). My data looks like this (full, self-contained code at

Hi all, After writing data in MMF(Memory Map File) using SEXP structure, can i reference in R? If input data is larger than 2GB, Can i reference MMF Data in R? my work environment : R version : 2.11.1 OS : WinXP Pro sp3 Thanks and best regards. Park, Young-Ju from Korea. ---------[ ???????? ???????? ???????? ]---------- ???????? : R-help Digest, Vol 89,

network. I did read somewhere on the web (several years ago) of a guy who managed to boot windows from the net. With the start of Win 98/ME/ etc.etc it's not posible anymore. I currently use PXE to install machine from the net using bpbatch that works great only bpbatch is not really under developnt and the script language is a bit buggy. I see only one option to boot windows from the net and

TEST 3 If you get a "connection refused" response then the smbd server may not be running. If you installed it in inetd.conf then you probably edited that file incorrectly. If you installed it as a daemon then check that it is running, and check that the netbios-ssn port is in a LISTEN state using "netstat -a". Note: You have xinetd not inetd on the redhat box. To avoid all